11211211201021 has 32 divisors (see below), whose sum is σ = 12285285199488. Its totient is φ = 10168203386880.

The previous prime is 11211211200971. The next prime is 11211211201129. The reversal of 11211211201021 is 12010211211211.

It is a cyclic number.

It is not a de Polignac number, because 11211211201021 - 2²¹ = 11211209103869 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11211211200986 and 11211211201004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11211211201621) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 569173845 + ... + 569193541.

It is an arithmetic number, because the mean of its divisors is an integer number (383915162484).

Almost surely, 2^{11211211201021} is an apocalyptic number.

It is an amenable number.

11211211201021 is a deficient number, since it is larger than the sum of its proper divisors (1074073998467).

11211211201021 is a wasteful number, since it uses less digits than its factorization.

11211211201021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21421.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 11211211201021 its reverse (12010211211211), we get a palindrome (23221422412232).

The spelling of 11211211201021 in words is "eleven trillion, two hundred eleven billion, two hundred eleven million, two hundred one thousand, twenty-one".